WO2005083839A1 - 広帯域フェルミアンテナの設計方法、設計プログラム及び設計プログラムを記録した記録媒体 - Google Patents
広帯域フェルミアンテナの設計方法、設計プログラム及び設計プログラムを記録した記録媒体 Download PDFInfo
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- WO2005083839A1 WO2005083839A1 PCT/JP2005/003825 JP2005003825W WO2005083839A1 WO 2005083839 A1 WO2005083839 A1 WO 2005083839A1 JP 2005003825 W JP2005003825 W JP 2005003825W WO 2005083839 A1 WO2005083839 A1 WO 2005083839A1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
- H01Q13/085—Slot-line radiating ends
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/18—Means for stabilising antennas on an unstable platform
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q21/22—Antenna units of the array energised non-uniformly in amplitude or phase, e.g. tapered array or binomial array
Definitions
- the present invention relates to a design method of a wideband Fermi antenna which is one of the tapered antennas TSA, a design program thereof, a design program, and a recording medium on which the design program is recorded.
- Millimeter waves are electromagnetic waves with a wavelength of about 10 mm to 1 mm, and their frequencies correspond to the 30 GHz to 300 GHz band.
- electromagnetic waves in this milli wave band are: a) a small and lightweight system can be realized; b) sharp directivity is obtained, so that interference and interference are less likely to occur; c) ) The wide frequency band allows for the handling of large amounts of information, d) High resolution can be obtained when used for sensing, and when compared to the visible or infrared region. E) extremely little attenuation due to fog or rainfall; f) good permeability to dust, dust, etc., and excellent environmental resistance.
- Active imaging involves irradiating a coherent millimeter wave emitted from a transmitter onto an object, receiving and detecting the reflected or transmitted wave, and obtaining an image corresponding to the received intensity or phase. This The method is used for radar and plasma electron density measurement.
- noisy imaging the thermal noise radiated by any object in proportion to its absolute temperature is received over a broad band in the millimeter wave band, and this is detected and amplified to obtain an image. It is a method. Power that has the advantage that no transmitter is required, and that it receives incoherent waves, so there is an advantage that signal processing is easy without interference effects. Therefore, a receiver with low noise and high sensitivity is required. This method is used in radiometers for measuring ozone and carbon monoxide in the atmosphere, and in radio astronomy.
- real-time passive imaging using the Millimeter wave transforms the general noise (thermal noise) generated from an object 100 such as a person or an object into a circular directivity. This is performed by receiving through the lens antenna 101 having the light receiving element for imaging 102 arranged at the focal point of the lens antenna 101. For this reason, the development of imaging light receiving elements (antennas) that are compatible with the lens antenna 101 has become extremely important.
- a real-time imaging method involves performing a mechanical run.However, this method requires a complicated mechanism for scanning, and requires a lot of time for measurement. It is difficult to obtain real-time images.
- the imaging array system which obtains an image by arranging a large number of receiving elements in a two-dimensional array, does not require a scanning mechanism and can perform measurement in a short time, so real-time imaging is possible. It is.
- one imaging light receiving element 102 is depicted, but actually, a plurality of imaging light receiving elements (keys) are illustrated. Antennas) are arranged in an array.
- the E-plane directivity is required for matching with the lens antenna 101.
- the H-plane directivity are almost the same.
- XZ plane is the resonance plane of the electric field
- Xy plane is a plane perpendicular to the E plane.
- the required characteristics are not only a wide band and suitable for an integrated array, but also a predetermined surface as many as possible because the number of array elements determines a pixel to be imaged. It is possible to arrange multiple antennas. In addition, it is necessary to amplify the received signal up to the noise level of the detector, but as an attenuator, it is required to be able to use it in order to reduce the loss to the amplifier.
- TSA Tape dsl ot Antenna
- This TSA is broadband, lightweight, thin and easy to manufacture by photolithographic technology, and easy to integrate, so it can be used for communication and measurement from microwave to millimeter wave frequencies. And are used for various purposes.
- the basic operating principle of this TS is described as a traveling wave antenna. That is, unlike a reflection type antenna such as a dipole antenna, the generated radio wave is interpreted as an antenna that propagates in the traveling direction without vibration.
- linear LTSA Linear TSA
- wrapper type exponential function Vivaldi TSA with a shape is often used.
- a tapered aperture antenna TSA called a Fermi antenna
- the structure of this Fermi antenna 10 is shown in Fig. , which is referred to as “Fermi function”) and has a comb-shaped corrugated structure 12 outside the dielectric substrate 11. It has been experimentally found that this antenna 10 has the same directivity on the E-plane and H-plane even if the substrate width D is small, and has a relatively low sidelobe level. It is considered to be suitable as a receiving antenna for millimeter wave imaging.
- FIG. 22 shows the basic structure of the Fermi antenna 10.
- the features of this antenna are, as described above, the tapered shape expressed by the Fermi-Drac function and the dielectric substrate. 1 1 has a corrugated structure 1 2 on the outside.
- This Fermi antenna can be easily manufactured on the dielectric substrate 11 using photolithography technology, and the antenna and the feed circuit can be formed on only one side of the dielectric substrate 11. Is advantageous.
- the Fermi function is known as a function representing the energy order of electrons in quantum mechanics, and given the structure and coordinate system shown in Fig. 22, it is generally given by the equation shown in [Equation 1]. Function.
- the design parameters of the Fermi antenna include the relative permittivity of the dielectric substrate ⁇ administratthe substrate thickness h, the antenna length L, the width of the corrugated structure w c , the pitch p, the corrugated length 1 c , and the tapered shape.
- the LTSA, Vivaldi, CWSA, and BLTSA are compared with the TSA using the Fermi function tape at a frequency of 60 GHz, and the Fermi function taper TSA is used when a wide substrate is used.
- the Fermi antenna substrate has been proposed.
- the directivity of the E-plane and the H-plane becomes different, but it is shown that the directivity can be made almost equal by providing a corrugated structure.
- the present inventors changed the tapered shape of the Fermi antenna (that is, the parameters a, b, and c of the Fermi function), the antenna length L, the dielectric thickness h, the opening width W, and the substrate width D.
- the radiation directivity of the antenna is determined by the FDTD (Finite Difference Time Domain) method to clarify the relationship between various parameters related to the structure of the ferrite antenna and the antenna characteristics, and to provide a ferrite suitable for an imaging receiving element.
- the optimum structure of the antenna was proposed (see Non-Patent Document 2).
- the TSA including the Fermi antenna has a number of structural parameters such as the function that determines the taper shape, antenna length, aperture width, finite substrate width, thickness, and specific permittivity. It has the characteristic that the radiation characteristics change significantly. Therefore, when designing Fermi antennas, empirical methods based on experiments and methods based on approximate calculations were used throughout. In other words, at present, even if a TSA is made and a good product is produced by accident, the characteristics change each time it is made, and a firm design theory has not been established. .
- Non-Patent Document 1 S. Sugawara etc. Am-m wave taperea slot antenna with improved radiation pattern, "IEEE MTT-S International Microwave Symposium Digest, pp. 959-962, Denver USA, 1997
- Non-Patent Document 2 Transactions of the Institute of Electronics, Information and Communication Engineers B. Vol. J80-B, No. 9 (200.3.9) Disclosure of the invention
- the present invention has been made in view of the above problems, and has as its object to provide a design method for obtaining a radiation pattern beam width having a circular directivity using a ferrite antenna, and to provide a method therefor. is there.
- the present invention relates to a method for designing a full-sized antenna with a circular shape having a broad directivity required for the transmission imaging of millimeter waves.
- the inflection of the Fermi / Remirrack function which is the number of taps of the Fermi antenna, is changed to set the beam width of the H plane with the target directivity, and the aperture width of the Fermi antenna is changed.
- the feature is that a wide band and circular directivity are realized.
- the present invention provides a step of providing a center frequency of a wideband frequency or a wavelength corresponding thereto, a step of determining an effective thickness of a dielectric plate of a fe / remanna, and a step of determining an antenna length of a fenoremanna.
- the beam width of the surface is compared with the preset target value of the beam width of the H surface.
- the beam width comparison step and the H-plane beam width comparison step if the above-mentioned preset H-plane beam width target value does not match, after changing the position of the inflection point, The step of comparing the beam width of the H plane again with the preset target value of the beam width of the H plane is repeated.
- the next step is to set the Fermi-antenna open P width as the next step.
- the present invention also includes a design program for realizing the _hD measuring method, and a program ⁇ ⁇ r ⁇ G spherical recording medium thereof.
- this is a program for designing a phenol antenna with a corrugator having a wide band and circular directivity required for receiving and imaging a microwave, and a method for giving a center frequency of a broadband frequency or a wavelength corresponding thereto.
- a procedure for determining the parameters of the Fermi-Drac function that forms the tapered shape of the Fermi antenna a procedure for setting the target values of the ⁇ surface and the ⁇ ⁇ ⁇ surface beam width of radio waves radiated from the Fermi antenna, and After arbitrarily setting the inflection point of the mi-function, comparing the above-mentioned surface beam with the previously set target value of the beam width of the surface.
- the position of the inflection point of the taper-shaped fertilizer V function was changed. Thereafter, the procedure of comparing the beam width of the H-plane with a predetermined target value of the beam width of the H-plane is repeated, and the procedure of comparing the H-plane beam width described above is repeated.
- the beam width of the H plane coincides with the predetermined HX & H H beam width
- the beam is radiated according to the procedure for setting the open P width of the fer and antenna, and based on the aperture width determined
- the procedure for comparing the beam width of the E-plane of the radio wave with the target value of the beam width of the E-plane previously transmitted to am t3 ⁇ 4-B and in the procedure for comparing the beam width of the E-plane, If the beam width does not match the target value of the E-plane beam width, the beam width of the E-plane is changed by changing the aperture width of the ferrite antenna.
- a broadband Fermi antenna that performs a procedure for designing such that both the H-plane beam width and the E-plane beam width have substantially the same circular directivity is obtained. Includes a program for design and a recording medium on which this program is recorded.
- the radiation patterns on the E-plane and the H-plane can be made to coincide with the target value in a relatively short time. Since the desired beam width can be provided on both sides, and the side ⁇ -bead can be set to a low value, the A suitable fenoremi antenna can be realized.
- FIG. 1 is a flowchart showing a design method and a program of a Fermi antenna according to a first embodiment of the present invention.
- FIG. 2 is a graph showing the relationship between the effective thickness and the gain of the dielectric substrate used for the film antenna of the present invention.
- Figure 3 shows the surface and the appearance of Fermi antenna with and without the dielectric.
- FIG. 9 is a diagram illustrating an operation pattern on a lower surface. ( ⁇ ) is the case without the dielectric, and ( ⁇ ) is the case with the dielectric.
- Figure 4 shows the intensity of the electric field inside and outside the taper of the Fermi antenna. It is.
- FIG. 5 is a graph showing the operating gain with respect to the effective corrugated length when glass is used as the dielectric substrate of the film antenna.
- Figure 6 is a graph showing the operating gain versus the effective corrugated length when alumina is used as the dielectric substrate of the Fermi antenna.
- Fig. 7 is a graph showing the frequency-gain characteristics for the relationship between the width and pitch of the corrugate of the Fermi antenna.
- 6 is a graph showing frequency-gain characteristics of an antenna.
- FIG. 8 is a diagram showing the inclination of the tangent at the inflection point when the taper inflection point of the Fermi antenna is at the center of the antenna length.
- Figure 9 shows the tapered shape (A) when the parameter b of the Fermi antenna is changed, and the frequency characteristics (B) of the side lobe level of the H plane.
- FIG. 10 is a diagram showing the slope of the tangent at the inflection point when the position of the inflection point of the tapered shape of the film antenna is moved to the vicinity of the antenna length of 14.
- FIG. 11 shows the 10 dB beam width (A) of the H-plane and E-plane for the change of the inflection point position of the Fermi antenna of the Fermi antenna, and the H-plane and E for the change of the aperture width of the Fermi antenna.
- FIG. 3 is a diagram showing a 10 dB beam width (B) of a surface.
- FIG. 12 is a diagram showing the operating gain when the difference d between the substrate width D and the opening width W of the Fermi antenna is changed.
- FIG. 3 is a diagram illustrating a structure of a film antenna.
- FIG. 14 is a diagram illustrating a gain characteristic (A) with respect to a change in the inflection point position of the Fermi antenna of the Fermi antenna and a gain characteristic (B) with respect to a change in the aperture width of the Fermi antenna.
- FIG. 15 shows the FDTD analysis and measured values of the H-plane directivity (A) and E-plane directivity (B) of the Fermi antenna designed by the design method of the present invention, and the 10 dB beam.
- FIG. 4 is a diagram illustrating a frequency characteristic (C) of a width.
- FIG. 17 is a diagram showing analysis values and measured values of the directivity (B) by the FDTD method.
- FIG. 17 shows the results when the material and thickness of the dielectric substrate were changed and the effective thickness was made the same in the design method of the present invention.
- the figure shows the analysis and measured values of the directivity (A) and the directivity (H) of the H plane (B) of the fenolemi antenna by the FDTD method.
- FIG. 18 is a view for explaining that in the design method of the present invention, the H-plane beam width is changed by changing the inflection point position, and the E-plane beam width is changed by changing the aperture width.
- FIG. 19 is a diagram showing a frequency characteristic of a 10 dB beam width and a gain pattern of a Fermi antenna designed by the design method of the present invention.
- FIG. 20 is a flowchart showing a method and a program for designing a Fermi antenna according to another embodiment of the present invention.
- Fig. 21 is a diagram schematically showing the principle of conventional millimeter wave passive imaging.
- FIG. 22 is a diagram showing the structure and principle of the Fermi antenna.
- Figure 23 shows an example of the dimensions of a typical Fermi antenna.
- the design parameters of the Fermi antenna include the relative permittivity of the dielectric substrate, the thickness h of the substrate, the antenna length L, the width w c of the corrugated structure, the pitch p, and the corrugated length 1.
- the parameters of the Fermi function that determine the taper shape, a, b, and c, which are indeed many, and how these values are selected will design a small and antenna with a desired beam width of BW de si gn. Whether this is possible will be explained together with a design example for a frequency of 35 GHz using the design flow chart shown in Fig. 1.
- the reason for setting the frequency to 35 GHz is that there is a frequency band near the 35 GHz, called the atmospheric window, where there is little attenuation of radio waves by the atmosphere, and the wavelength corresponding to 35 GHz is 8.57 mm. Since the half-wavelength is 4.28 mm, it is possible to design the image to the limit of the Rayleigh resolution of 5 mm, which is the limit for separating the images of the two object points. It is.
- a point image by an optical system has a spread distribution centered on a paraxial image point due to a light diffraction phenomenon, so that the images of two objects in close proximity are partially overlapped. As this overlap increases, it is possible to consider the minimum distance that makes it impossible to recognize the image of two object points.
- the minimum distance between such two object points is called the resolution of the optical system, and the Rayleigh resolution is applied to the limit at which the images of these two object points can be separated.
- the FDTD method is a method of numerically solving this by replacing Maxwell's equation given by the partial differentiation of the electric and magnetic fields in time and space with the difference between time and space.
- the FDD method has the advantage of high versatility, but has the disadvantage of requiring large-scale memory and long numerical calculations in order to divide the space into rectangular cells.
- FIG. 1 is a flow chart showing an embodiment of a method for designing a broadband Fermi antenna according to the present invention.
- a design example of a Fermi antenna having a circular directivity according to this flow chart will be described.
- Figures 2 to 19 are diagrams for explaining the data that is the basis for determining each parameter.
- Fermi antennas generally have a wide band of several octaves, and the center frequency means the center frequency of the wide band. Therefore, being broadband means that a relatively wide band around the center frequency can be used. For example, if 35 GHz is selected as the center frequency, it means that the design can be used from about 30 GHz to about 40 GHz.
- the effective thickness of the dielectric substrate is determined (Step S2).
- the effective thickness is, as shown in [Equation 2], the value obtained by multiplying the value obtained by subtracting 1 from the square root of the relative permittivity ⁇ of the dielectric substrate by the thickness h of the dielectric substrate, Furthermore, the wavelength ⁇ corresponding to the center frequency. Divided by. In step S2, this value is set so as to satisfy [Equation 2].
- the dielectric substrate thickness h 3 stages (0. lmm, 0. 2mm, 0. 5mm) monitor and to alter the, the relative dielectric constant epsilon r 2 stages (3.7, 9.8)
- the graph shows the operating gain when the effective thickness is changed by changing to.
- the effective thickness is in the highest gain in the vicinity of 01 0.5. This is actually When the effective thickness is around 0.01, the corrugated structure and the dielectric inside the taper both act as a slow-wave structure, and the electromagnetic waves along them have the same phase and the effective aperture area can be expanded. And due to. In other words, the near-slot axis of the Fermi antenna has a slow-wave structure from the beginning, but the corrugated structure also has a slow-wave structure in the periphery, and the electromagnetic wave is the same over the entire aperture width. It is emitted as a phase.
- the antenna length (L) is determined (step S3).
- Fig. 4 shows the analysis of the electric field strength distribution near the slot line axis of the taper of the Fermi antenna and the vicinity of the colgate in order to determine the antenna length L.
- the antenna length L is obtained by electromagnetic field analysis using the FDTD method, which is the length at which the wave excited by the slot line is sufficiently attenuated at the tip of the antenna. This can be determined.
- This corrugated structure is a slow wave line often used for horn antennas and the like, and has been used for changing the beam width in a conventional Fermi antenna.
- the dimensions of the corrugated structure of the present invention are different from the conventional ones in that they are not changed once determined.
- step S4 the length 1c of the corrugate is determined.
- effective Koruge preparative length l e 5 Remind as in FIG. 6, the effective Korugu preparative length 1.
- Figure 5 shows the results of FDTD analysis of the operating gain of a glass substrate (relative permittivity 3.7) and aluminum substrate (relative permittivity 9.8) with the corrugate length changed.
- ⁇ g is the effective wavelength, and the central wavelength in vacuum. Is divided by the square root of the dielectric constant. The power sale by shown in the analysis results of FIG.
- step S5 the parameters (a, b, c) of the Fermi function are determined (step S5). This parameter determines the taper shape of the Fermi function.
- an initial value of the parameter a is set.
- the initial value of the parameter c is set.
- This parameter c is a parameter indicating the position of the inflection point of the taper shape of the Fermi function in the axial direction of the Fermi antenna.
- the beam width on the H plane is mainly determined by the parameter c.
- the parameter b is determined.
- the taper shape is substantially straight (L.TSA). Therefore, the parameter b is set to 2.4 / ⁇ to further reduce the side lobe level on the H plane. The frequency change of the sidelobe level was analyzed.
- a 0.455 ⁇ .
- Fig. 9 b 1 / E as you can see.
- a target value BW design of a beam width to be designed on the H plane and the E plane is set (step S6).
- the design frequency is set to 35 GHz
- the value of the inflection point c of the Fermi function is provisionally set (step S7).
- the value is set to a value of c ⁇ L / 2, which is half of the antenna length L set as the initial value in step S5, and the process proceeds to the next determination step S8.
- the target value of the beam width on the H plane is 52. If the beam width on the H plane does not match the target value of 52 ° in decision step S6, the process proceeds to the next step of determining the beam width on the E plane.
- FIG. 10 shows an example in which this inflection point c is changed.
- Figure 10 is a diagram when the inflection point c is shifted leftward from the center position of the antenna length, and the value of this inflection point c greatly contributes to the change in the beam width of the H plane. ing.
- FIG. 10 is a diagram showing the 10 dB beam width when the position of the inflection point is changed while fixing the position of the inflection point.
- Inflection point c is 2 ⁇ . From; When it is reduced to as small as possible, the 10 dB beam width on the surface changes from 70.4 ° to the target value of 52 °.
- FIG. 11 (A) is a plot of the data when the opening width W is changed without changing the position of the inflection point c.
- step S9 the inflection point c of the Fermi function is changed in step S9, and the judgment in step S8 is performed.
- step S10 the aperture width W of the Fermi antenna is temporarily set.
- the figure shows the tapered shape of the Fermi antenna when the opening width W (2a) is changed under the above conditions.
- Fig. 11 (B) shows the case where the parameters b and c are set to constant values and the aperture width W
- the opening width W is 0.91 ⁇ . Power, et al 0.32.
- the change in the beam width on the H plane at this time was only 1.2 °, and it can be seen that the beam width was kept almost constant irrespective of the change in the aperture width.
- Fig. 11 (A) shows that the change in the inflection point c has a large effect on the change in the beam width on the H plane, and has little effect on the beam width on the E plane.
- Fig. 11 (B) shows that the change in the aperture width W has a large effect on the beam width on the E plane, and a small effect on the beam width on the H plane.
- Fig. 14 (A) is a graph showing the operating gain when the position of the inflection point c of the Fermi function is changed
- Fig. 14 (B) is a graph when the aperture width of the Fermi antenna is changed
- 6 is a graph showing an operation gain.
- Fig. 14 (A) if the position of the inflection point c is moved to the left without changing the aperture width, that is, if the value of c is reduced, a high gain can be achieved.
- the opening width W is 0.91. Power 0.32. It can be seen that even if it is as small as possible, the decreasing gain is as small as about 1 dB.
- Figure 15 shows the operating gain patterns of the measured value ( ⁇ ) and the analysis value (solid line) analyzed by the FDTD method when measuring the thermal noise emitted from the object using the Fermi antenna designed by the above method. It is a print.
- Figure 15 (A) shows the operating gain pattern on the H plane
- Figure 15 (B) shows the operating gain pattern on the E plane
- Figure 15 (C) 1 shows the frequency characteristic of the OdB beam width. From this figure, it can be seen that the beam width on the H plane is wider than the beam width on the E plane.
- the measured value and the FDTD analysis value show a similarity as the frequency increases and the difference decreases as the frequency decreases, starting at around 35 GHz. Can be said to be increasing.
- Figure 16 shows that the opening width W is 0.32 ⁇ . This is a plot of the behavior pattern of the analysis value (solid line) analyzed by the FDTD method, as well as the measurement value (marked with ⁇ ) when thermal noise was measured using a Fermi antenna designed as follows. As is clear from this figure, the opening width W is 0.32 mm. As a result, the degree of coincidence of the directivity patterns on both the side (FIG. 16B) and the side (FIG. 16B) is high, and circular directivity is realized. I understand. In addition, it can be seen that the measured values obtained by the experiment and the analyzed values agree very well.
- zm is a plot of the motion pattern of the measured values (dotted line) when using zm). It was found that the radiation directivities of the E-plane (Fig. 17A;) and the H-plane (Fig. 17B) matched very well. As is clear from the experimental results, it was confirmed that even if the material of the dielectric substrate was changed, an extremely close operating gain pattern could be obtained by making the effective thickness equal.
- FIG. 18 shows the position of the inflection point c of the Fermi antenna obtained by the above-described design procedure, and the change in the operating gain pattern with respect to the change in the aperture width W.
- Fig. 19 is a graph that plots the relationship between the frequency of the Fermi antenna designed by the above design procedure and the 10dB beam width.
- the beam widths of the H-plane and E-plane are almost equal in a wide frequency band from 32.5 GHz to about 40 GHz.
- the Fermi antenna designed by the design method of the present invention has a 10 dB beam width with a wide bandwidth, an operating gain of 14.8 dBi, and sidelobes on the E and H planes.
- Axisymmetric radiation directivities of 20.1 dB and 16.8 dB are obtained, respectively. '
- step S10 the aperture width of the antenna is changed (step S1 2), and step S1 is performed again. Reverted to 0.
- the H-plane beam width determination process loop is included in the E-plane beam width determination process loop, so the H-plane beam width (aperture width) always depends on the H-plane beam width. There is a possibility that the beam width is affected. However, as can be seen from Fig. 11 (B), even if the aperture width W changes, the beam width on the H plane remains substantially constant. Similar to G, a Fermi antenna with the same radiation directivity on the E and H planes can be designed.
- the radiation patterns on the E-plane and the H-plane can be made the same pattern in a relatively short time by a fixed procedure. It is possible.
- the E-plane and H-plane can be used as high-gain antennas, have a desired beam width, and have a low side lobe. It is possible to realize a film antenna suitable for a student element.
- the design method and design program of the Fermi antenna of the present invention are not limited to the above-described embodiments, and may be appropriately modified and used without departing from the scope of the claims. It goes without saying that we can do it.
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Application Number | Priority Date | Filing Date | Title |
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EP05720097A EP1727238A4 (en) | 2004-03-02 | 2005-03-01 | A METHOD OF DESIGNING A WIDE BAND FERMIED ANTENNA, AND A DESIGN PROGRAM AND RECORDING MEDIUM CONTAINING THE DESIGN PROGRAM |
KR1020067017678A KR101089682B1 (ko) | 2004-03-02 | 2005-03-01 | 광대역 페르미 안테나의 설계방법, 설계 프로그램 및 설계프로그램을 기록한 기록매체 |
US11/514,642 US7629936B2 (en) | 2004-03-02 | 2006-09-01 | Broad-band Fermi antenna design method, design program, and recording medium containing the design program |
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JP2004058031A JP4208077B2 (ja) | 2004-03-02 | 2004-03-02 | 広帯域フェルミアンテナの設計方法及び設計プログラム |
JP2004-058031 | 2004-03-02 |
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US (1) | US7629936B2 (ja) |
EP (1) | EP1727238A4 (ja) |
JP (1) | JP4208077B2 (ja) |
KR (1) | KR101089682B1 (ja) |
WO (1) | WO2005083839A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN110612641A (zh) * | 2017-05-12 | 2019-12-24 | 瑞典爱立信有限公司 | 宽带天线 |
Families Citing this family (14)
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---|---|---|---|---|
US7773043B1 (en) * | 2007-02-08 | 2010-08-10 | The United States Of America As Represented By The Secretary Of The Navy | Variable aspect ratio tapered slot antenna for increased directivity and gain |
US7692596B1 (en) * | 2007-03-08 | 2010-04-06 | The United States Of America As Represented By The Secretary Of The Navy | VAR TSA for extended low frequency response method |
DE102008004417A1 (de) * | 2008-01-14 | 2009-07-16 | Robert Bosch Gmbh | Vorrichtung zum Senden und/oder Empfangen elektromagnetischer HF-Signale |
US7746266B2 (en) * | 2008-03-20 | 2010-06-29 | The Curators Of The University Of Missouri | Microwave and millimeter wave imaging system |
US20100328142A1 (en) * | 2008-03-20 | 2010-12-30 | The Curators Of The University Of Missouri | Microwave and millimeter wave resonant sensor having perpendicular feed, and imaging system |
CN102300749A (zh) * | 2009-02-06 | 2011-12-28 | 马斯普罗电工株式会社 | 乘坐状态检测设备以及用于移动体的乘坐者监控系统 |
JP5485771B2 (ja) * | 2010-03-31 | 2014-05-07 | マスプロ電工株式会社 | アンテナおよびセンサ |
TWI464958B (zh) | 2010-12-03 | 2014-12-11 | Ind Tech Res Inst | 天線結構及其所組成之多波束天線陣列 |
DE102011004316B4 (de) | 2011-02-17 | 2020-08-06 | Continental Automotive Gmbh | Mehrbandantenne geeignet für C2X-Verbindungen |
ITTO20110990A1 (it) | 2011-10-28 | 2013-04-29 | Silicon Biosystems Spa | Metodo ed apparato per l'analisi ottica di particelle a basse temperature |
US10320082B2 (en) * | 2016-07-29 | 2019-06-11 | At&T Mobility Ii Llc | High directivity slot antenna |
JP2022013961A (ja) * | 2018-11-06 | 2022-01-19 | Agc株式会社 | 平面アンテナ |
US10649585B1 (en) * | 2019-01-08 | 2020-05-12 | Nxp B.V. | Electric field sensor |
EP3719929B1 (en) * | 2019-04-04 | 2022-10-12 | Rohde & Schwarz GmbH & Co. KG | Antenna system and compact antenna test range |
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JP3462959B2 (ja) * | 1996-06-24 | 2003-11-05 | 株式会社リコー | 平面アンテナ |
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US6008770A (en) | 1996-06-24 | 1999-12-28 | Ricoh Company, Ltd. | Planar antenna and antenna array |
US6075493A (en) * | 1997-08-11 | 2000-06-13 | Ricoh Company, Ltd. | Tapered slot antenna |
US6219001B1 (en) * | 1998-12-18 | 2001-04-17 | Ricoh Company, Ltd. | Tapered slot antenna having a corrugated structure |
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- 2004-03-02 JP JP2004058031A patent/JP4208077B2/ja not_active Expired - Fee Related
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2005
- 2005-03-01 KR KR1020067017678A patent/KR101089682B1/ko not_active IP Right Cessation
- 2005-03-01 WO PCT/JP2005/003825 patent/WO2005083839A1/ja active Application Filing
- 2005-03-01 EP EP05720097A patent/EP1727238A4/en not_active Withdrawn
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JP3462959B2 (ja) * | 1996-06-24 | 2003-11-05 | 株式会社リコー | 平面アンテナ |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110612641A (zh) * | 2017-05-12 | 2019-12-24 | 瑞典爱立信有限公司 | 宽带天线 |
CN110612641B (zh) * | 2017-05-12 | 2021-06-25 | 瑞典爱立信有限公司 | 宽带天线 |
US11276941B2 (en) | 2017-05-12 | 2022-03-15 | Telefonaktiebolaget Lm Ericsson (Publ) | Broadband antenna |
Also Published As
Publication number | Publication date |
---|---|
KR20060131867A (ko) | 2006-12-20 |
EP1727238A1 (en) | 2006-11-29 |
JP2007116205A (ja) | 2007-05-10 |
US7629936B2 (en) | 2009-12-08 |
US20070152898A1 (en) | 2007-07-05 |
KR101089682B1 (ko) | 2011-12-07 |
JP4208077B2 (ja) | 2009-01-14 |
EP1727238A4 (en) | 2007-10-10 |
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